Carbureter for internal-combustion engines.



F. BAVBREY. CARBURBTBR FOBl INTERNAL GOMBUSTION ENGINES. APPLIUATIONPILED s111111A 17, 1912.

l 1,08%372 Panama Mar. 3, 1914 straits arnnr onirica To SOCIT DU CARBURATEUR ZENITH, 0F LYON, IFR-ANCE.

CARBURETER FOR INTERNAL-COMBUSTION ENGINES.

To all whom t may concern:

Be it known that l, FnANQoIs BAVEREY, a citizen of the French Republic, residing at Oullins, in F rance, have invented certain new and useful Improvements in Carburet-v ers for InternaLCombustion Engines, of which the following is a specification.

rlhis invention relates to improvements in carbureters of the kind provided with a principal jet for the feed of fuel in the usual manner; and an auxiliary fuel jet 'operating during starting of the motor and slow running thereof.

The present invention provides an improved arrangement of the auxiliary jet tube and improved means for feeding the chamber in which the auxiliary jet sucks.

rlhe auxiliary jet orifice is arranged to issue into the suction conduit at a point opposite the edge of the throttle valve regulatingthe suction in such a way that when said valve is closed its edge completely closes the auxiliary jetorice. A

rlhe annexed drawing illustrates the invention and shows the carbureter in section. The Vauxiliary `iet orice a of'relatively large section issues into the suction conduit 7L at a point opposite the edge c1 of the throttle valve c as shown in the drawing, so that it is completely obturated by the edge or surface c1 when the valve c is closed and is progressively uncovered as the throttle valve` ris opened.Y The sectional area of the oricc a thus increases from the start of the action of the carburetor during the period when practically no fuel is fed by the ordinary jet d. llhe sectional area of sufficiently open to fully uncover same,v the suction then becoming sucient to put the principal jet Z in action.

'llhe auxiliary jet suclrs through atube j from a chamber fed with fuel through a calibrated orifice o forming a communication with the constant level vessel z'. The chamber b is preferably arranged in a well which communicates with the float chamber assuch vconstruction facilitates the mounting of the chamber and also serves to keep more steady the levelof the liquid immediately surrounding the chamber.

if the chamber were freely' open to atmospheric pressure the orifice o being under constant pressure would have a constant feed, independently of the suction of Specification of Letters Patent. Application filed September 1'?, 1912.

the orifice t becomes constant when the throttle valveiis Serial No. 720,822.

feed of the orifice 0. By suitably selecting the respective sizes of the orifices a c 0 by calculation or by experiment the Carburation can be regulated in a permanent manner for any` type of motor,v the feed of the orifice 0 can nevertheless be varied within certain limits by adjusting the height of the orice 0 by adjusting' the tube f and chamber b relatively to the sleeve g upon which sleeve the tube and chamber are frictionally supported.-

It has been found by trial that carbureters provided with orifices of the dimensions set forth in the following table have given very good results Diameter of orifices.

I a. v I M 1st earbnreter 0,3 mm. i 0.5 mm. mm. 2nd carbureter 0.4 mm. i 0,8 mm. 3.0 mm. 3rd carburetcr 0.6 mm. 1 1.2 mm 3.5 mm. 4th carbureter i 1.0 mm, l 1.4 mm 4.0 mm.

t in each case the orifice c should be just atmospheric may be but one orifice c having the necessary area or there may be a numberof orifices whose total area is equalto the necessary area.

What if claim as my invention and desire to secure by Letters Patent of the lUnited States is l., A carbureter for explosion motors comprising in combination a principal fuel jet, an auxiliary fuel tube having a feed orifice issuing into the motor suction conduit at a Patented Mar. 3, lltllt.

of said conduit when said valve is closed, an Aauxiliaryfuel container having means lfor the supply of fuel thereto, and means for maintaining atmospheric' pressure therein, and a tube Within lsaid auxiliary fuel con- 25 tainer, in Which said auxiliary fuel tube sucks, said tube being provided with a calibrated orifice for the feed of fuel from said auxiliary fuel container therein and having air inlet orifices in its Walls communicating a" with said auxiliaryJ container, said orifices being of a size to produce reduced atmospheric pressure in said tube.

In' Witness whereof I have signed this point opposite the edge of the throttle valve of said conduit when said valve is closed, an auxiliary fuel container having means for the supply of fuel thereto, and means for maintaining atmospheric pressure therein, and a tube adjustable as regards its height Within said auxiliary fuel container, in which said auxiliary fuel tube sucks, said adjustable tube being provided lwith a cali.- brated orifice for the feed f fuel from said auxiliary fuel container therein and having air inlet orices in its Walls communicating with said auxiliary container, said orifices being of a size to produce reduced atmosheric pressure in said adjustable tube.

2. A carbure-ter for explosion motors comprising in combination a principal fuel jet, an auxiliary fuel tube having a feed Orifice issuing into the motor suction conduit at a point opposite the edge of the throttle valve rnaneois Bavnnnr.

Witnesses z GASTON JEANNIAUX, Maures MERMAZ.

specification in the presence of tivo Witnesses. 35v 

